Shade for x-ray tubes.



PATENTED JULY 19, 1904.

R. FRIEDLANDER. SHADE PORK-RAY TUBES.

APPLICATION FILED SEPT. 19. 1903.

N0 MODEL.

Inv 62 050 7" a side elevation of the shield or shade.

ROBERT FRIEDLANDER,

Patented July 19, 1904.

PATENT OFFICE.

or CHICAGO, ILLINOIS.

SHADE FOR X-RAY TUBES.

SPECIFIGATIONforming part of Letters Patent No. 765,469, dated July 19,1904.

Application filed September 19, 1903. Serial No. 173,786. (No model.) 7

To all whom. it may concern.-

Be it known that I, ROBERT FRIEDLANDER, a citizen of the United Statesof America, and a resident of Chicago, in the county of Cook and Stateof Illinois, have invented certain new and useful Improvements in Shadesfor X-Itay Tubes, of which the following is a specification.

The present invention relates to ray-intercepting shades or shields forray-tubes, and more particularly to that type of such shades whichconstitute the subject-matter of my prior Letters Patent, No. 731,767,dated the 23d day of June, 1903; and the object of the presentimprovement is to provide-a simple and efiicient shade constructionhaving high non-conducting properties which permits of the closeapplication of the shade to the raytube without liability of said shadeforming a short circuit between the terminals of the ray-tube, and whichconstruction in addition is adapted to afiord ashade of great lightnessand opacity to the rays emanating from a raytube, all as willhereinafter more fully appear and be more particularly pointed out inthe claims.

In the accompanying drawings, illustrative of the present invention,Figure 1 is a sectional elevation illustrating the preferred form of thepresent invention with an ordinary X- ray tube shown in positiontherein. Fig. 2 is 3 is an end elevation of the same.

Similar numerals of reference indicate like parts in the difierentviews.

The present invention involves the formation of the ray-tube shield orshade with a base. or formation portion 1, of paper-pulp or otherequivalent light and rigid material, and a series of coatings 2 of apaintlike composition of matter which is opaque to X and other likerays. Such coatings in the present improved method of manufacture areapplied serially and between each application are exposed to a thoroughdrying operation in any usual and suitable manner in order to attain acomplete drying of one coating before an application of the nextsucceeding coating. From extended practical experiment it has Fig.-

been found that such coatings applied in the manner above described, andconsisting of what is known to the paint trade as whitelead drier, andconsisting of white-lead pigment ground in drier-oil, assumes a denseand coherent condition, having a very superior non-conducting naturethat permits of the close application of the shade or shield to aray-tube without liability of the material of the shade forming a shortcircuit between the ray-tube terminals. ther show that a given degree ofopacity can be attained by the present invention with a much less weightof material in the shield than can be attained with a shield in whichthe ray-intercepting portion is formed from sheet-lead and fromlead-foil, as in my former patented construction.

The ray-tube shield made as above described may have any suitable formwhich a particular use of the same may indicate and for ordinary usewith an X-ray tube is preferably of the semispherical shell form shownin the present drawings and as set forth in my for- Such experimentsfur-' mer patented construction of June 23, 1903,

and in the particular construction shown will comprise a structuralformation as follows.

3 is an outlet passage or neck in and upon the shield and through whichthe desired rays from a ray-tube are permitted to pass for use by theoperator. Such passage or neck is so arranged on the body of the shieldas to receive the central and more direct rays emanating from aray-tube.

4 and 5, are removable annular stops fitting the orifice or passage ofthe aforesaid neck 3 and adapted to regulate the size of such oriiice tosuit any particular requirement at the will of the operator.

6 is a projecting stem or handle on the exterior of the shield forconvenience in handling as Well as in an attachment of the shield to theclamp-arm of a supporting-tripod.

7 and 8 are opposed marginal recesses formed in the shield and adaptedto receive the tubular necks of the ray-tube and form a support for thesame in proper relation to the aforesaid outlet passage on neck 3 of theshield.

Having thus fully described my said invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. A shield for ray-tubes, comprisingasupporting body portion ofpaper-pulp or the like, and a series of coatings of a paint-likenon-conducting composition opaque to X and like rays, substantially asset forth.

2. A shield for ray-tubes, comprising a supporting, body portion ofpaper-pulp or the like and having a semispherical form, and a series ofcoatings of a paint-like non-conducting composition opaque to X and likerays, substantially set forth.

V 3. 7 A shield for ray-tubes, comprisinga supporting body portion ofpaper-pulp or the like and having an outlet-neck, and a series ofcoatings of a paint-like non-conducting composition opaque to X and likerays, substantially as set forth.

4:. A shield for ray-tubes, comprising a supporting body portion ofpaper-pulp or the like semispherical in form and having an outlet-neck,and a series of coatings of a paintlike non-conducting compositionopaque to X and like rays, substantially as set forth.

5. A shield for ray-tubes, comprising a supporting body portion ofpaper-pulp or the like, and a series of coatings of a white-lead drierimposed upon such base, substantially as set forth.

6. A shield for ray-tubes, comprisinga supporting body portion ofpaper-pulp or the like and having a semispherical form, and a series ofcoatings of white-lead drier imposed upon such base, substantially asset forth.

7 A shield for ray-tubes, comprising a supporting body portion ofpaper-pulp or the like and having an outlet-neck, and a series ofcoatings of white-lead drier imposed upon such base, substantially asset forth.

8. A shield'for ray-tubes, comprising a supporting body portion ofpaper-pulp or the like semispherical in form and having an outlet-neckand a series of coatings of white-lead drier imposed upon such base,substantially as set forth.

Signed at Chicago, Illinois, this 16th day of September, 1903.

ROBERT FRIEDLANDER.

Witnesses:

ROBERT BURNS, THEODOR FRIEDLANDER.

